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根据以下内容回答题：The growth of Liu Yongxing‘s animal-feed business has made him China’s richest man， according to rankings published recently by Forbes magazine. With an estimated net worth of US$1 billion，the 53-year-old entrepreneur and his Shanghai-based Hope Group are symbols of the new ChinA．
But Forbes’ list of the 100 richest individuals in China also illustrates the growing income inequality here that alarms some officials. The Forbes survey found that the 100 richest people in China had a combined net worth of US$18 billion in the year ended September 30. That’s small change by US standards：The most recent Forbes ranking of global billionaires put the net worth of Bill Gates alone at more than US$58 billion. But what‘s remarkable about China’s wealth numbers is how fast they‘re rising. The wealth of the top 50 on this year’s China list jumped 40 per cent，to US$14 billion，from US$10 billion last year despite a global economic slump.
The richest man in China acquired his wealth _____. A．in the animal feed business
B．in America
C．from Forbes magazine
D．from his ancestors
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